Anvil for rivet-setting machines



(No Model.)

H. MEADE.

ANVIL FOR RIVET SETTING MACHINES.

Patented Sept. 8, 1885.

menial: Georgeli. Meade,

Wibuesses:

I sure TATES' PATENT rrrcn.

. GEORGE H. MEADE, OF QUINCY, ASSIGNOB TO MELLEN BRAY, OF NEWTON,

MASSACHUSETTS.

ANVlL FOR RlVET-SETTING MACHINES.

SPECIPICATIONforming part of Letters Patent No. 325,689, dated September8, 1885.

Application filed October 15, 1884. (No model.)

To (tZZ whom it may concern.-

Be it known that I, GEORGE H. MEADE, of Quincy, in the county of Norfolkand State of Massachusetts, have invented certain new and 5 usefulImprovements in Anvils for Rivet-Setting Machines, of which thefollowing, taken in connection with the accompanying drawings, is aspecification.

My invention relates to anvils for rivetsetting machines; and itconsists in certain novel constructions and arrangements of partswhereby rivets made with a wedge-shaped shank (as fully described inanother application of even date herewith) may be readily set in anysuitable material by splitting or dividing said shank and forcing oneportion thereof in one direction, while the other is being forced in theopposite direction, all of which will be readily understoodby referenceto the description of the drawings, and to the claims to be hereinaftergiven.

()f-the drawings, Figure 1 represents a plan of my improved anvil. Fig.2 represents an elevation of the same. Fig. 3 represents a section online a; on Figs. 1 and 2. Fig. 4 represents a section on line 3/ 3 onFig. 3. Fig. 5 represents a plan of the central core thereof enlarged.Fig. 6 represents a side elevation of the same, and Fig. 7 represents afront elevation of the same.

A is the main portion of the anvil, which is provided with the shank B,by which it is firmly secured to the machine for setting the rivets. Themain portion A. is provided at its upper end with a cylindrical recessor cavity, in which is secured the central core or tool, a, of adiameter equal to the diameter of the rivet to be set. This tool a, hasits upper end provided with a straight knifeedge, I), extending fromside to side through the center thereof, and upon either side of saidknife-edge b it is provided with an inclined plane, 0 0', each of whichinclines in a direction opposite to the other, as plainly shown in Figs.5, 6, and 7. The tool a is firmly held from moving about its axis in therecess by the set screw (1 hearing against the flat portion 0, in anobvious manner. The

upper end of the main portion A is also pro rounds the tool a, and hasits lower inner edge contiguous and even with thelower edges of theinclined planes 0 c. The shank B being firmly secured to the bed of therivetsetting machine, (not shown,) a rivet, constructed substantially asdescribed in the before-mentioned other application, is fed intoposition above the anvil, so that the cuttingedge of said wedge-shapedshank will be at vided with a slight concavity, j, which sur- 5o rightangles with the cutting knife-edge b, and

the center of the length of said wedge-shaped shank will be directlyabove the center of the length of said cutting knife-edge b, and thenthe said rivet is firmly forced through the material into which it isdestined to be set against said knife-edge I) until the shank thereof issplit or divided, and one portion thereof is forced in one direction bythe in clined plane 0, while the other is forced in the oppositedirection by the inclined plane 0 until these portions of the shank ofthe rivet come in Contact with the upwardlycurved surface formed by theconcavity f in the upper end of the main portion A, when these ends areforced upward and forced into the material, thus firmly clamping betweenthe head and themselves any material in which they may have been placed.

The inclinations c and c are shown in the drawings as being curved; buteach or both of them may be straight and fiat inclined planes Without inany way affecting the principles of my invention.

hat I claim as new, and desire to secure by Letters Patent of the UnitedStates,is

1. An anvil for setting rivets, having its upper end provided with twoplane or curved surfaces inclined in directions opposite to each other,substantially as shown and described.

2. An anvil for setting rivets, provided with the inclined plane orcurved surfaces 0, o, and f, all arranged substantially as shown anddescribed.

3. An anvil for setting rivets, provided with in a direction opposite tothe other, substan- I to this specification, in the presence of twotially as shown and described. subscribing witnesses, on this 13th dayof Oc- 4. An anvilfor setting rivets, provided with tober, A. D. 1884.

the knife I) and the inclined planes or curved GEORGE H. MEADE. 5surfaces 0, c, and f, all arranged substantially Witnesses:

as shown and described. N. (J. LOMBARD,

In testimony whereof Ihave signed my name XVALTER E. LOMBARD.

